Keyboard



FIG. 1 is a front elevational view of a keyboard showing our new design;

FIG. 2 is rear elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a side elevational view thereof as seen from the left of FIG. 1;

FIG. 6 is a side elevational view thereof as seen from the right of FIG. 1;

FIG. 7 is a top, front perspective view thereof. 

The ornamental design for a keyboard, as shown and described. 